Cat scratching post



FIG. 1 is a front elevational view showing my new design for a cat scratching post;

FIG. 2 is a left side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view.

The broken line drawings of the base are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a cat scratching post, as shown and described. 